Unimasters | 21/04/2026
Series
8,000 km in 45 Days: BESS Logistics from China to CEE
The shipment is booked. The containers are sealed at the factory. The vessel is scheduled. But is the cargo actually protected?
The BESS containers have cleared factory acceptance testing. The carrier has confirmed the booking. The Bill of Lading is being prepared.
At this point in the journey—before the containers even reach the port of loading—the insurance question must already be answered. Not "do we have insurance?" but "does the insurance we have actually cover what can go wrong with this specific cargo, on this specific route, under these specific conditions?"
For BESS shipments, this is not a formality. It is a financial decision that can determine whether a thermal event at sea results in a claim payment or a coverage denial.
Marine cargo insurance for BESS operates under the same Institute Cargo Clauses (ICC) framework that governs all maritime cargo—but the application to lithium-ion battery systems introduces specific complexities that standard commodity shipments do not face.
The Institute Cargo Clauses, published by the International Underwriting Association (IUA) and Lloyd's Market Association (LMA), define three tiers of coverage:
For BESS shipments classified as UN3536 (lithium batteries installed in cargo transport unit), ICC(A) is the standard recommendation. The broader coverage addresses the range of potential damage scenarios during a 28–65 day transit from Asia to CEE ports.
A common misconception is that General Average (GA) coverage is a "gap" to check for. In fact, ICC(A), ICC(B), and ICC(C)—both the 1982 and 2009 editions—all include General Average coverage.
The correct framing: GA exposure is a primary reason to have cargo insurance, not a gap in existing policies.
General Average, governed by the York-Antwerp Rules (2016 edition), requires all cargo owners on a vessel to proportionally share losses when a voluntary sacrifice is made to save the ship. Recent high-profile GA declarations—the Ever Given (2021), the Dali (2024)—demonstrate that cargo owners without insurance must post cash deposits or bonds before their cargo is released. For a 230 MWh BESS project with 40+ containers, the GA contribution exposure can be substantial.
The most critical exclusion for BESS cargo is inherent vice—damage arising from the nature of the goods themselves rather than external perils. Standard ICC(A) wording excludes "loss damage or expense caused by inherent vice or nature of the subject-matter insured."
For lithium-ion batteries, thermal runaway may be argued as inherent vice. If a battery cell enters thermal runaway due to an internal defect rather than external damage, insurers can potentially deny the claim under this exclusion.
This exclusion must be explicitly addressed in the policy wording for BESS shipments. Without negotiated coverage for thermal events, insurers retain the argument that thermal runaway is an inherent characteristic of the cargo, not an insured peril. Most insurance brokers handling BESS cargo negotiate specific endorsements to address this risk—but the coverage must be confirmed in writing before the shipment departs.
ICC clauses exclude "loss damage or expense caused by delay, even though the delay be caused by a risk insured against." This exclusion refers to physical damage to cargo caused by delay—for example, battery degradation from extended storage in extreme temperatures.
It does not mean financial losses from late project completion. Financial project delays—missed commissioning windows, grid connection penalties, revenue losses—require a separate policy: Delay in Start-Up (DSU) or Marine Delay in Start-Up (MDSU). Property and cargo insurance excludes all financial and consequential losses by design.
Insurance arrangements should be finalized before the booking is confirmed—typically 2–4 weeks before the vessel's estimated departure from the origin port.
Key timeline considerations:
Where procurement teams underestimate:
| Document | Purpose | Critical Field |
|---|---|---|
| Insurance Certificate or Policy | Proof of coverage for customs, financing, and claims | Insured value, voyage description, ICC clause version |
| Insured Value Declaration | Basis for premium calculation and claim settlement | FOB value + freight + markup (15–20%), declared separately |
| Document | Purpose | Critical Field |
|---|---|---|
| Commercial Invoice | Establishes cargo value | FOB or CIF value, currency, Incoterm |
| Packing List | Confirms cargo details | Container numbers, weights, serial numbers |
| Document | Purpose | Critical Field |
|---|---|---|
| Bill of Lading (final version) | Proof of carriage contract | Cargo description, weight, consignee |
The insured value is not simply the invoice amount. The correct approach:
Insured Value = FOB Invoice Value + Freight Cost + Markup (15–20%)
Each component should be declared as a separate line item. The markup covers anticipated profit, customs duties and clearance costs, and incidental expenses at destination.
Critical error to avoid: If the invoice states a CIF amount but the actual commercial invoice is FOB, the insurer pays based on the actual (lower) FOB value. Declaring a lower cargo value than actual leads to proportionally lower compensation—the insurer pays based on the declared amount.
What happened: A BESS container experienced thermal runaway during the sea leg. The cargo owner filed a claim under their ICC(A) policy. The insurer denied the claim, arguing that thermal runaway is an inherent characteristic of lithium-ion batteries—not an external peril.
Why: The policy did not include a negotiated endorsement explicitly covering thermal events. The standard ICC(A) inherent vice exclusion applied.
Consequence: The cargo owner bore the full loss. The project timeline slipped by the time required to source replacement containers.
Prevention: Before policy inception, confirm in writing that the policy includes coverage for thermal events in lithium-ion battery cargo. This requires explicit negotiation—it is not automatic under standard ICC(A) wording.
What happened: A BESS shipment was insured at the FOB invoice value only. During a General Average event, the cargo owner's contribution was calculated based on the full landed cost (CIF + duties + inland transport). The insurance payout covered only the declared FOB value.
Protection on paper means nothing when saltwater meets silicon.
Why: The insured value did not include freight, insurance markup, or anticipated costs. The policy paid exactly what was declared—nothing more.
Consequence: The cargo owner paid the difference between the declared value and the actual GA contribution out of pocket.
Prevention: Declare the insured value as FOB + freight + 15–20% markup. Verify the calculation methodology with the broker before shipment.
What happened: A project team insured the PCS (Power Conversion System) units separately from the battery containers, assuming this would simplify claims. Both shipments traveled on the same vessel.
Why: The insurer applied the higher dangerous goods tariff to the entire shipment value when calculating the battery policy premium. The PCS policy was priced at standard cargo rates. The combined premium exceeded what a single policy covering both would have cost.
Consequence: Higher total insurance cost with no claims benefit. Combining PCS and batteries on one policy does not create claims issues—the practical issue is premium calculation.
Prevention: If PCS and battery containers travel on the same vessel, a single policy covering both is typically more cost-effective. Discuss the routing with the broker before splitting coverage.
What happened: Under FOB (Free on Board) Incoterms, the buyer must arrange their own insurance from the port of loading—unlike CIF, there is no contractual insurance obligation on either party under FOB. The buyer's procurement team assumed the seller's policy covered the sea leg. It did not.
Why: Under Incoterms 2020, FOB places no insurance obligation on the seller. The buyer must arrange coverage. Under CIF (Cost, Insurance, and Freight), the seller must provide ICC(A) maximum coverage—but CIF is less common for BESS shipments from Asia.
Consequence: The cargo traveled uninsured for the sea leg. No incident occurred, but the exposure was significant.
Prevention: Verify the Incoterm in the purchase contract. Under FOB or FCA, the buyer must arrange insurance. Under CIF, confirm the seller's policy meets ICC(A) requirements and covers the full voyage to the CEE destination.
Q: What Institute Cargo Clause is recommended for BESS shipments?
A: ICC(A) is the standard recommendation for BESS cargo classified as UN3536. It provides "all risks" coverage except specifically excluded perils, which is appropriate for the range of potential damage scenarios during 28–65 day transits from Asia to CEE.
Q: Does ICC(A) automatically cover thermal runaway in lithium-ion batteries?
A: No. Standard ICC(A) excludes "inherent vice"—damage arising from the nature of the goods. Thermal runaway may be argued as inherent vice. Explicit coverage for thermal events must be negotiated and confirmed in writing before policy inception.
Q: How should the insured value be calculated for BESS cargo?
A: Insured value should be declared as FOB invoice value + freight cost + 15–20% markup, with each component listed separately. This ensures full recovery in case of total loss or General Average contribution.
Q: Is General Average coverage a gap to check for in cargo policies?
A: No. ICC(A), ICC(B), and ICC(C)—both 1982 and 2009 editions—all include General Average coverage. GA exposure is a primary reason to have cargo insurance, not a coverage gap.
Q: Does cargo insurance cover financial losses from project delays?
A: No. The "delay" exclusion in ICC clauses refers to physical damage caused by delay (e.g., battery degradation). Financial losses from late commissioning require a separate Delay in Start-Up (DSU) or Marine DSU policy.
Q: Who is responsible for arranging insurance under FOB Incoterms?
A: Under FOB (Free on Board), the buyer must arrange insurance from the port of loading. The seller has no insurance obligation. Under CIF (Cost, Insurance, and Freight), the seller must provide ICC(A) coverage per Incoterms 2020.
Q: Can a marine cargo policy expire if the vessel departs late?
A: No. Marine cargo policies have a start date and run until voyage completion, including inland legs. Delayed sailing does not invalidate the policy. The policy attaches when goods are first moved for loading at the origin.
